766397819 has 8 divisors (see below), whose sum is σ = 864900720. Its totient is φ = 672700000.

The previous prime is 766397809. The next prime is 766397837. The reversal of 766397819 is 918793667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 766397819 - 2⁴ = 766397803 is a prime.

It is a super-4 number, since 4×766397819⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766397809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200932 + ... + 1201569.

It is an arithmetic number, because the mean of its divisors is an integer number (108112590).

Almost surely, 2^766397819 is an apocalyptic number.

766397819 is a deficient number, since it is larger than the sum of its proper divisors (98502901).

766397819 is a wasteful number, since it uses less digits than its factorization.

766397819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402541.

The product of its digits is 3429216, while the sum is 56.

The square root of 766397819 is about 27683.8909656862. The cubic root of 766397819 is about 915.1341314508.

The spelling of 766397819 in words is "seven hundred sixty-six million, three hundred ninety-seven thousand, eight hundred nineteen".